Plum HVAC guides Redwood City homeowners through heat pump replacement decisions, outlining when replacement is wiser than repair based on age, cost, efficiency, and major component failure. We explain how our technicians assess system age, size new equipment, and select energy-efficient units compatible with existing ductwork. We cover rebates, financing, and our step-by-step replacement process, including permitting, installation, charging, and testing. We also outline expected costs, warranties, and long-term maintenance benefits for reliable, climate-appropriate comfort today.

Heat Pump Replacement in Redwood City, CA

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Heat Pump Replacement in Redwood City, CA

Choosing to replace a heat pump is a big decision for Redwood City homeowners. With our mild Mediterranean climate, homes need efficient year-round temperature control more than extreme heating capacity. This page explains when to replace versus repair, how technicians assess age and efficiency, equipment selection and sizing, energy-efficiency and rebate/financing options relevant to the Bay Area, the replacement process step-by-step, and realistic expectations for costs and warranties. The goal is to give you clear, practical information so you can make an informed decision about heat pump replacement in Redwood City, CA.

When to Replace vs Repair

Deciding between repair and replacement depends on several clear signals:

Age of the system: Most heat pumps last 10 to 15 years. If your unit is older than 10 years and showing problems, replacement is often the smarter long-term choice.
Frequency and cost of repairs: Repeated service calls or a single large repair that approaches 30-50% of a new system’s cost is a sign to replace.
Efficiency drop and higher bills: Noticeably higher energy bills or poor comfort even after repairs may mean the system has lost efficiency.
Major component failure: Compressor failure, severe refrigerant leaks, or a failing reversing valve are expensive repairs that often justify replacement.
Regulatory or refrigerant issues: Older systems using phased-out refrigerants (like R-22) can be costly to service and may be better replaced with a modern, environmentally friendly unit.
Home comfort and lifestyle changes: If you’ve remodeled, added space, or want improved humidity control and quieter operation, replacement with a properly sized modern heat pump can deliver those benefits.

Common Heat Pump Problems in Redwood City

Insufficient heating on cool, damp nights
Weak airflow due to duct leaks or undersized supply
Short cycling from incorrect sizing or failing controls
Refrigerant leaks and low charge
Icing in colder snaps (rare in Redwood City but possible in higher elevations)
Electrical issues from old wiring or inadequate breaker capacity

How Technicians Assess System Age and Efficiency

A professional assessment typically includes:

Visual inspection of indoor and outdoor units
Checking model and serial numbers to determine manufacture date and original specifications
Measuring airflow, refrigerant pressure, and operating temperatures
Inspecting ductwork for leaks and insulation issues
Reviewing electrical components and safety controls
Calculating seasonal performance using SEER and HSPF equivalents for existing equipment
Heating and cooling load review (see sizing below) to confirm whether the existing capacity matches current needs

Equipment Selection and Sizing Considerations

Right-sizing and choosing the right configuration is critical for efficiency and comfort.

Load calculation (Manual J): A proper Manual J load calculation considers Redwood City’s mild winters, solar gain, insulation levels, window orientation, and occupancy to determine required capacity.
System type: Options include ducted split systems, packaged units, and ductless mini-splits. Ductless systems can be a strong choice for older homes with poor ductwork.
Efficiency ratings: Look for higher SEER (cooling) and HSPF or HSPF2 (heating) ratings. ENERGY STAR certified options save more energy over time.
Compressor type: Variable-speed or inverter-driven compressors provide better efficiency and comfort by modulating output rather than cycling on and off.
Compatibility with existing ductwork: Evaluate duct condition and size. Significant duct repairs or sealing may be required and will affect system selection.
Electrical service: New heat pumps, especially high-efficiency models, may require electrical upgrades such as larger breakers or a dedicated circuit.

Energy-Efficiency, Rebates, and Financing Options

Redwood City homeowners have access to several efficiency and electrification incentives:

Utility and regional programs often offer rebates for high-efficiency heat pumps and electrification projects. Local utilities and municipal programs may also support home electrification.
State and federal incentives can apply to qualifying high-efficiency equipment and may be combined with utility rebates.
Financing options include energy-efficiency loans, on-bill financing, and PACE-style programs that spread cost over time. Many homeowners combine incentives and financing to reduce upfront expense and improve payback.When considering replacement, factor incentives into the total lifecycle cost to get a realistic view of savings and payback.

The Heat Pump Replacement Process (Step-by-Step)

Initial assessment and load calculation: Confirm capacity needs and review ductwork and electrical requirements.
Equipment selection: Choose a model based on efficiency, capacity, and compatibility with the home.
Permitting and scheduling: Obtain required permits and schedule work in accordance with local codes in Redwood City.
Removal of old equipment: Safely recover refrigerant, disconnect electrical, and remove outdoor and indoor components.
Ductwork coordination: Seal, repair, or modify ducts as needed to ensure proper airflow and efficiency.
Installation: Mount outdoor unit, set up indoor air handler or heads (for ductless), connect refrigerant lines, and make electrical connections.
Charging and commissioning: Evacuate lines, charge refrigerant to manufacturer specs, and balance airflow. Modern systems require precise refrigerant and airflow tuning.
Testing and inspection: Run system through full cycle, verify performance metrics, and complete any required municipal inspections.
Owner orientation: Demonstrate controls, maintenance expectations, and optimal setpoints for comfort and efficiency.

Expected Costs and Warranties

Costs vary based on system size, efficiency, ductwork needs, and complexity:

Ducted split systems: Typical replacements in Redwood City commonly range from moderately priced models to high-efficiency installations. Expect variability due to labor, permits, and ductwork.
Ductless mini-splits: Costs depend on the number of zones and indoor heads required to cover living spaces.Factors that drive cost:
Capacity (tonnage)
Efficiency rating and technology (inverter, variable-speed)
Duct repairs or replacements
Electrical panel upgrades or new circuits
Permit and inspection feesWarranties to expect:
Manufacturer parts warranty: Often 5 to 10 years for parts; premium models may offer longer coverage for compressors.
Compressor warranty: Commonly 10 years on high-end models.
Installer labor warranty: Typically 1 to 5 years; some providers offer extended labor warranties.Always confirm warranty terms and prerequisites, such as required annual maintenance, to keep warranties valid.

Long-Term Benefits and Maintenance Tips

Replacing an older heat pump can provide:

Lower energy bills and improved comfort year-round in Redwood City’s mild climate
Quieter operation and more consistent indoor temperatures
Better humidity control and improved indoor air quality with updated filtration options
Higher home value and readiness for electrification trends in the Bay AreaMaintenance advice to protect your investment:
Schedule annual professional tune-ups for refrigerant checks, airflow diagnostics, and safety inspection
Replace or clean filters regularly to maintain airflow and efficiency
Keep outdoor units clear of debris and vegetation, and ensure proper airflow
Address duct leaks and insulation to maximize system performance

Final note: Proper assessment and sizing are the foundation of a successful heat pump replacement in Redwood City, CA. Understanding the factors above—system age, efficiency, ductwork condition, local incentives, and the replacement process—will help you choose a solution that delivers comfort, reliability, and long-term savings.

testimonials

hear what our satisfied clients have to say

5.0

We found Plum HVAC in 2024 after spending more than 2 months searching and comparing estimates. The owner Sam gave us a very competitive price for a Mitsubishi mini-split and the installation went off without a hitch. Our experience was so positive that we later requested their services twice more to also install A/Cs for our 2 other rooms. Their technician, Jake, led our installations each time and we were very impressed by their professionalism and quality of work. Now 1 year in and we could not be any happier, nor have we encountered any issues with our models.

Jesse Y.

5.0

Sam of Plum HVAC, responded to our Heat Pump installation request promptly and provided a very competitive estimate after an onsite visit. He was very flexible and patient to answer and explain our questions. After we signed the contract, he and his team of 4 worked very hard to deliver and install the whole Heat Pump system on time with good quality. I am particularly impressed by their problem solving skills to overcome different connection challenges for the attic installation. Each day before they started, they covered the floors with protection blankets and cleaned after they were done for the day. They also revised the drainage and electric work per the city inspection guidance. Sam and his team were professional and honest so we highly recommend Plum HVAC to any customers who need HVAC work done for their houses.

Chunshi C.

5.0

We needed to install a mini-split in a backyard unit. Sam and his team helped with this, and they did a fantastic job. Sam visited our place and clearly explained to me what needed to be done, and offered a great price. He scheduled the job for a few days later, and his team performed the job with extraordinary quality. Later, I noticed a minor issue and reached out to them. Sam helped me to fix the issue on a second visit by his team later in the week, providing top-notch customer service. I will work with them in the future for my HVAC jobs, and highly recommend them given their excellent work quality and customer service.

Majid J.

5.0

I reached out to 4 companies for mini split quotes; Plum HVAC pricing came in the lowest. Beyond that, Sam was very knowledgeable and kind during the in home consultation. He offered a quote in person, & stuck by it. They removed our old furnace, and installed a two head mini split in our two story townhouse. The work as you can see is very clean! The guys who installed it were very fun & professional. Sam & his team were communicative the whole way through including the permitting process. They took roughly one full day for install, which was very fast! Including removal & disposal of our old furnace. Natalie was very helpful throughout the Bayren Rebate process & always available for any questions! This system has changed our lives, wish we would have gotten it done sooner! It’s way better than we could have imagined.

Bobby R.

5.0

Plum HVAC exceeded my expectations in every way. Sam and his installer team were not only professional but also incredibly responsible throughout the entire process. They provided top-notch service at a very reasonable price, which is hard to come by these days. I highly recommend Plum HVAC to anyone looking for quality HVAC services. You won't be disappointed!

A Chui

5.0

I recently engaged Plum HVAC to install two mini-split units at my residence, and I'm thrilled with the outcome.Throughout the entire process, from the initial consultation to the project's completion, Plum HVAC showcased professionalism and expertise. The technician, Sam, arrived promptly and conducted a comprehensive assessment of my HVAC system. Sam took the time to thoroughly explain the technicians' tasks, the estimated duration of the project, and provided transparent pricing options.

Romero J.

5.0

Wonderful experience with Plum HVAC on a heat pump installation! I checked several companies, compared their recommendations, timelines, reputations and prices.Sam, the owner, was very professional and has almost 2 decades of experience in HVAC. When I asked dumb questions, he answered most graciously. And when I noted that some companies we queried said we could get away WITHOUT replacing our original ductwork from 1965, he gave us his honest opinion why that wasn't a good idea. (Hubby remembered later that people who worked in our attic adding insulation told us there were lots of duct leaks.)

Marlene S.

5.0

I called 8 different HVAC companies for quotes for a heat pump heating/ac system because I want to save money by switching from a forced air gas furnace to an electric heat pump system which will give me both heating and air conditioning. In addition my old furnace (circa 1991) was way oversized for my home and the air coming out too noisy. The New heat pump system is quieter and more efficient. Back to the quotes for the system, all the other 7 companies sent a salesperson/advisor to give the quote. Sam, the owner of Plum HVAC came our to give the quote. He was quick with his quote and was very knowledgeable. He didn't try to upsell me on anything and have the lowest quote of them all. His price was 60% less than the highest quote and 15% lower than the next second lowest quote.

Michael C.

5.0

Plum HVAC is an extremely professional, knowledgeable, and an established company to hire. I highly recommend Plum HVAC! Sam and his crew did a wonderful job. Sam worked with my schedule and his crew had completed the job with ease.

Blake

5.0

Sam was one of the most professional business owners I had the chance to meet over the past few years and I'm so happy I trusted him to install our new A/C unit.- He showed up on time- He was transparent (and reasonable) regarding pricing- He offered 2-3 options- His crew did a very clean/thorough jobWhat I loved the most though, was the fact he was very easy to communicate with. I would definitely use him again and recommend him to our neighbors/friends.

Bruno L.

5.0

We recently had a complicated Bryant Evolution dual fuel system with variable speed and zoning installed in our home by Plum HVAC, and we are very pleased! The team also changed the entire crawl space ducting, ensuring a comprehensive upgrade. The price was fair, and the team was always on time and easy to contact. Sam Mousavi, the head of the team, paid great attention to detail and demonstrated a strong understanding of systems. His expertise in HVAC systems and his friendly character made us feel comfortable throughout the process. We highly recommend Plum HVAC for their professionalism and excellent service.

Amirali B.

5.0

I cannot say enough about Plum HVAC, who replaced my aging heater furnace, and in particular Sam. Sam was very highly recommended by my sister, who replaced her furnace and added air conditioning.First, they gave me a good deal for a 2-stage, at the same cost as the lowest bid for a 1-stage. The other bids were dancing around some gas line work made by previous owners.

Kumar S.

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